webgl: Use mediump in triangle test
webgl: Use mediump in triangle test

Support for this should be almost universal.

pyfisch/servo,szeged/servo,splav/servo,cbrewster/servo,upsuper/servo,thiagopnts/servo,pyfisch/servo,peterjoel/servo,dati91/servo,thiagopnts/servo,fiji-flo/servo,fiji-flo/servo,KiChjang/servo,canaltinova/servo,KiChjang/servo,ConnorGBrewster/servo,dati91/servo,ConnorGBrewster/servo,saneyuki/servo,mattnenterprise/servo,peterjoel/servo,emilio/servo,avadacatavra/servo,avadacatavra/servo,KiChjang/servo,jimberlage/servo,fiji-flo/servo,nnethercote/servo,steveklabnik/servo,peterjoel/servo,notriddle/servo,mattnenterprise/servo,mattnenterprise/servo,peterjoel/servo,dsandeephegde/servo,nnethercote/servo,paulrouget/servo,rnestler/servo,paulrouget/servo,cbrewster/servo,larsbergstrom/servo,szeged/servo,paulrouget/servo,DominoTree/servo,canaltinova/servo,emilio/servo,pyfisch/servo,peterjoel/servo,DominoTree/servo,dsandeephegde/servo,mbrubeck/servo,SimonSapin/servo,thiagopnts/servo,anthgur/servo,dsandeephegde/servo,dati91/servo,canaltinova/servo,anthgur/servo,mattnenterprise/servo,mbrubeck/servo,SimonSapin/servo,CJ8664/servo,jimberlage/servo,pyfisch/servo,fiji-flo/servo,mattnenterprise/servo,sadmansk/servo,CJ8664/servo,paulrouget/servo,mattnenterprise/servo,mbrubeck/servo,steveklabnik/servo,anthgur/servo,thiagopnts/servo,emilio/servo,larsbergstrom/servo,emilio/servo,thiagopnts/servo,avadacatavra/servo,eddyb/servo,nnethercote/servo,dsandeephegde/servo,fiji-flo/servo,upsuper/servo,steveklabnik/servo,saneyuki/servo,SimonSapin/servo,larsbergstrom/servo,mbrubeck/servo,canaltinova/servo,cbrewster/servo,sadmansk/servo,mbrubeck/servo,nnethercote/servo,nrc/servo,fiji-flo/servo,ConnorGBrewster/servo,sadmansk/servo,KiChjang/servo,splav/servo,thiagopnts/servo,pyfisch/servo,sadmansk/servo,dati91/servo,notriddle/servo,fiji-flo/servo,DominoTree/servo,SimonSapin/servo,pyfisch/servo,emilio/servo,peterjoel/servo,splav/servo,mattnenterprise/servo,canaltinova/servo,paulrouget/servo,splav/servo,sadmansk/servo,szeged/servo,DominoTree/servo,upsuper/servo,KiChjang/servo,cbrewster/servo,pyfisch/servo,DominoTree/servo,fiji-flo/servo,SimonSapin/servo,szeged/servo,KiChjang/servo,nrc/servo,nrc/servo,pyfisch/servo,nnethercote/servo,anthgur/servo,nnethercote/servo,upsuper/servo,ConnorGBrewster/servo,nnethercote/servo,CJ8664/servo,saneyuki/servo,anthgur/servo,saneyuki/servo,avadacatavra/servo,larsbergstrom/servo,anthgur/servo,upsuper/servo,mbrubeck/servo,avadacatavra/servo,splav/servo,CJ8664/servo,steveklabnik/servo,jimberlage/servo,emilio/servo,eddyb/servo,larsbergstrom/servo,splav/servo,saneyuki/servo,paulrouget/servo,eddyb/servo,saneyuki/servo,rnestler/servo,steveklabnik/servo,splav/servo,dsandeephegde/servo,nrc/servo,SimonSapin/servo,emilio/servo,eddyb/servo,larsbergstrom/servo,KiChjang/servo,notriddle/servo,splav/servo,avadacatavra/servo,KiChjang/servo,peterjoel/servo,anthgur/servo,eddyb/servo,saneyuki/servo,rnestler/servo,peterjoel/servo,emilio/servo,SimonSapin/servo,DominoTree/servo,DominoTree/servo,larsbergstrom/servo,notriddle/servo,thiagopnts/servo,dsandeephegde/servo,saneyuki/servo,steveklabnik/servo,jimberlage/servo,dati91/servo,CJ8664/servo,mbrubeck/servo,ConnorGBrewster/servo,DominoTree/servo,saneyuki/servo,paulrouget/servo,upsuper/servo,avadacatavra/servo,steveklabnik/servo,canaltinova/servo,szeged/servo,ConnorGBrewster/servo,cbrewster/servo,KiChjang/servo,upsuper/servo,thiagopnts/servo,dati91/servo,nrc/servo,paulrouget/servo,rnestler/servo,cbrewster/servo,nnethercote/servo,pyfisch/servo,SimonSapin/servo,mattnenterprise/servo,notriddle/servo,canaltinova/servo,notriddle/servo,saneyuki/servo,pyfisch/servo,CJ8664/servo,eddyb/servo,anthgur/servo,jimberlage/servo,emilio/servo,dati91/servo,larsbergstrom/servo,mbrubeck/servo,ConnorGBrewster/servo,emilio/servo,KiChjang/servo,CJ8664/servo,jimberlage/servo,larsbergstrom/servo,cbrewster/servo,nrc/servo,sadmansk/servo,szeged/servo,szeged/servo,notriddle/servo,notriddle/servo,rnestler/servo,sadmansk/servo,peterjoel/servo,notriddle/servo,eddyb/servo,larsbergstrom/servo,rnestler/servo,splav/servo,CJ8664/servo,paulrouget/servo,splav/servo,jimberlage/servo,notriddle/servo,szeged/servo,upsuper/servo,paulrouget/servo,canaltinova/servo,ConnorGBrewster/servo,peterjoel/servo,jimberlage/servo,szeged/servo,rnestler/servo,dsandeephegde/servo,cbrewster/servo,dsandeephegde/servo,DominoTree/servo,rnestler/servo,nrc/servo,nnethercote/servo,szeged/servo,jimberlage/servo,DominoTree/servo,avadacatavra/servo,eddyb/servo,nnethercote/servo,dati91/servo,sadmansk/servo